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King Fahd University of Petroleum and Minerals Civil Engineering Department. CE599-Seminar Traffic Calming Techniques By: Maen A. Abu Olba. Presentation Outline. Definition. Main objectives. Main types. Design principles Practical example. Conclusions and Recommendations.

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king fahd university of petroleum and minerals civil engineering department

King Fahd University of Petroleum and MineralsCivil Engineering Department

CE599-Seminar

Traffic Calming Techniques

By: Maen A. Abu Olba

presentation outline
Presentation Outline
  • Definition.
  • Main objectives.
  • Main types.
  • Design principles
  • Practical example.
  • Conclusions and Recommendations
what is traffic calming
What is Traffic Calming?
  • Traffic calming is the combination of mainly physical measures that reduce the negative effects of motor vehicle use, alter driver behavior and improve conditions for non-motorized street users
objectives of traffic calming
Objectives of Traffic Calming
  • Achieving slow speeds and low volumes of motor vehicles.
  • Reducing collision frequency and severity.
  • Increasing the safety and the perception of safety for non-motorized users of the street(s).
  • Reducing the need for police enforcement.
  • Reducing air pollution and noise associated with increased traffic speed and volume.
traffic calming techniques measures
Traffic Calming Techniques (Measures)
  • Volume control measures:

are primarily used to address cut-through traffic problems by blockingcertain movements, thereby diverting traffic to streets better able to handle it.

  • Speed control measures:

are primarily used to reduce the speed. Two types: vertical deflection and horizontal deflection.

speed control measures
Speed Control Measures

Vertical Deflection

  • Speed Humps:
slide9
b
  • Speed tables:
horizontal deflection
Horizontal Deflection
  • Traffic Circles
design principles horizontal curvature vs vehicle speed
Design PrinciplesHorizontal Curvature vs. Vehicle Speed
  • Relation between horizontal curvature to operating speed is represented by the following formula :

R = V2 / 15(e+f)

  • For traffic calming purposes, Rrepresents the maximumhorizontal radius required to cause driver discomfort and reduce his speed.
vertical curvature vs vehicle speed
Vertical Curvature vs. Vehicle Speed
  • Crossing speed is a function of the cross-sectional area. The greater the ratio of cross-sectional area to length, the lower the design speed.
practical examples u s a
Practical ExamplesU.S.A
  • In North Ida Avenue project in Portland, (OR.), the first phase of the project involved 14-foot speed humps at three locations.
  • These installations were followed by the narrowing of travel lanes to make room for bicycle lanes.
conclusions and recommendations
Conclusions and recommendations
  • The construction cost of different traffic calming measures varies based on the material used in the construction and the use of landscaping.
  • The traffic calming measures must be designed to accommodate emergency vehicles.
  • Avoid placing traffic calming measures near hospitals and fire stations.
slide17
Traffic calming measures reduce speed, collision severity and crime.
  • Traffic calming should be well marked and delineated
  • Adequate traffic singes must be installed in the area of traffic calming measures.
  • They are generally more self-enforcing thaneducation and traditional enforcement efforts
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